i already posted this in another thread but i think this is here correct, too:
we are using PL/SQL Developer 8.0.4, too and have a similar issue.
We have Windows 7 SP1 host systems and Windows Server 2008 R2 Citrix Server. PL/SQL Developer is running in both environments (dev and prod)!
The Citrix Receiver is Up-To-Date (3.1).
When trying to copy from the Citrix Session to the Host Windows 7 System it needs about 3-5 Sec that the copied text from the SQL Developer can be pasted into the host system! This occures with a XP Host-System, too. We try to paste it by pressing CTRL+V few times but nothing happens.. after 3-5 sec we have to press CTRL+V again and then its pasting the correct text.
Resetting the accelerators did not work.
Disabling the Office 2010 clipboard options (in Word or Excel) also not worked.
Is there any Solution for this Problem known?
Edit: We found out something new -> When trying to copy from Citrix PL/SQL Developer to Host PL/SQL Developer we get a Error message saying "Cannot open clipboard"